BALANCING EQUATIONS PRACTICE

1.)        ___ CH4  +  ___ O2    ___ CO2  +  ___ H2O

2.)        ___ Na  +  ___ I2    ___ NaI

3.)        ___ N2  +  ___ O2    ___ N2O

4.)        ___ N2  +  ___ H2    ___ NH3

5.)        ___ KI  +  ___ Cl2    ___ KCl  +  ___ I2

6.)        ___ HCl  +  ___ Ca(OH)2    ___ CaCl2  +  ___ H2O

7.)        ___ KClO3    ___ KCl  +  ___ O2

8.)        ___ K3PO4  +  ___ HCl    ___ KCl  +  ___ H3PO4

9.)        ___ S  +  ___ O2    ___ SO3

10.)        ___ KI  +  ___ Pb(NO3)2    ___ KNO3  +  ___ PbI2

11.)        ___ CaSO4  +  ___ AlBr3    ___ CaBr2  +  ___ Al2(SO4)3

12.)        ___ H2O2    ___ H2O  +  ___ O2

13.)        ___ Na  +  ___ H2  ___ NaOH  +  __ H2

14.)        ___ C2H6  +  ___ O2    ___ CO2  +  ___ H2O

15.)        ___ Mg(NO3)2  +  ___ K3PO4    ___ Mg3(PO4)2  +  ___ KNO3

 

 


REACTION TYPES

--> Balance each equation.
--> Identify the type of reaction as:
>             * S - synthesis                * D - decomposition                * C - combustion
            * SR - single replacement                * DR - double replacement
TYPE
____
1. ___ Fe  +  ___ O2 
  ___ Fe2O3
____ 2. ___ Cl2  +  ___ KBr 
  ___ KCl  +  ___ Br2
____ 3. ___ Fe  +  ___ Cu(NO3)2 
  ___ Fe(NO3)3  +  ___ Cu
____ 4. ___ NaCl 
  ___ Na  +  ___ Cl2
____ 5. ___ FeCl3  +  ___ KOH 
  ___ KCl  +  ___ Fe(OH)3
____ 6. ___ KClO3 
  ___ KCl  +  ___ O2
____ 7. ___ Al  +  ___ O2 
  ___ Al2O3
____ 8. ___ Na2S  +  ___ AgNO3 
  ___ Ag2S  +  ___ NaNO3
____ 9. ___ CaCO3 
  ___ CaO  +  ___ CO2
____ 10. ___ Mg  +  ___HCl 
  ___ MgCl2  +  ___ H2
____ 11. ___ Mg(OH)2  +  ___ HCl 
  ___ MgCl2  +  ___ H2O
____ 12. ___ Na2SO4  +  ___ BaCl2 
  ___ BaSO4  +  ___ NaCl
____ 13. ___ C2H2  +  ___O2 
  ___ CO2  +  ___ H2O
____ 14. ___ CaI2  +  ___ F2 
  ___ CaF2  +  ___ I2
____ 15. ___ NaOH 
  ___ Na2O  +  ___ H2O
____ 16. ___ ZnBr2  +  ___ AgNO3 
  ___ AgBr  +  ___ Zn(NO3)2
____ 17. ___ C4H10  +  ___ O2 
  ___ CO2  +  ___ H2O
____ 18. ___ K  +  ___ Br2 
  ___ KBr
____ 19. ___ NaHCO3 
  ___ Na2CO3  +  ___ H2O  +  ___ CO2
____ 20. ___ AgNO3  +  ___ Cu 
  ___ Ag  +  ___ Cu(NO3)2
____ 21. ___ CuSO4  +  ___ NaOH 
  ___ Cu(OH)2  +  ___ Na2SO4
____ 22. ___ Ca(ClO3)2 
  ___ CaCl2  +  ___ O2
____ 23. ___ PH3  +  ___ O2 
  ___ H3PO4
____ 24. ___ H2O  +  ___ Fe 
  ___ H2  +  ___ Fe3O4
____ 25. ___ NO  +  ___ O2 
  ___ NO2


PREDICTING PRODUCTS 1 

COMBUSTION REACTIONS:
1.         ___ CH4 + ___ O2
2.         ___ C4H10 + ___ O2

3.         ___ C8H18 + ___ O2

DOUBLE REPLACEMENT REACTIONS:
1.         ___ AgNO3 + ___ CaCl2
2.         ___ BaBr2 + ___ K2SO4
3.         ___ ZnCr2O7 + ___ Na2O

4.         ___ Al(OH) 3 + ___ Mg(C2H3O2) 2

5.         ___ SnCO3 + ___ Li3N

6.         ___ AlF3 + ___ Pb3(PO4) 2

SINGLE REPLACEMENT REACTIONS:
1. ___ Al + ___ NiBr2
2.    ___ Fe2(SO4) 3 + ___ Ag

3. ___ NaCl + ___ F2

4.     ___ Ba(NO3) 2 + ___ Ni

5. ___ I2 + ___ AlBr3

6.      ___ Ca + ___ KCl

7.      ___ Mg + ___ Zn3(PO4) 2

8.    ___ Na + ___ SnCO3

SYNTHESIS REACTIONS:  
1.         ___ H2 + ___ O2
2.         ___ Na + ___ I2

3.         ___ Mg + ___ N2

4.         ___ Li + ___ Br2

5.         ___ Ag + ___ S

6.         ___ Al + ___ O2

DECOMPOSITION REACTIONS:
1. ___ LiClO3
2.         ___ NaHCO3

3.         ___ Al2(CO3)3

4.         ___ NaCl

5.         ___ Fe2O3


Predicting Products 2

Directions:  Tell products of the following reactions and then balance the equations.

1.  Ca(NO3)2  +  K2CO3 

2.  Zn(HCO3)2 

3.  Ba + CaSO4 

4.  Li  +  Br2 

5.  Ba(NO3)2  +  CuSO4 

6.  Na  +  Pb(C2H3O2)2 

7.  C9H20  +  O2 

8.  MgSO3  +  AgNO3 

9.  Al  +  S 

10.  Ca(ClO3)2 

11.  C7H16  +  O2 

12.  Na  +  CaCO3 


UNITS 7B & 8 REVIEW SHEET

Part 1 Oxidation Numbers Find the oxidation number of the underlined element in each compound.

1.) NO2

2.) Ca(ClO)2

3.) K2C2O4

 

Part 2 Percent Composition Find the percent by mass of the underlined element in each compound.

4.) (NH4)2SO4

5.) Ca(ClO)2

6.) K2C2O4

 

Part 3 Empirical and Molecular Formulas Solve the following problems.

7.) What is the empirical formula of a compound that contains 40.5 % zinc, 19.9 % sulfur, and 39.6 % oxygen?

 

8.) A compound contains 43.7 % phosphorus and 56.3 % oxygen. What is the empirical formula for this compound? If this compound has a molar mass of 243 g/mole, what is its molecular formula?

 

9.) Complete the following data table.

 

 

Trial 1

7

Moles of water

 

1

Mass of empty test tube (g)

7.35

8

Molar mass of anhydrous salt: MgSO4

 

2

Mass of hydrate & test tube (g)

7.84

9

Mass of anhydrous salt (g)

 

3

Mass after 1st heating (g)

7.61

10

Moles of anhydrous salt

 

4

Mass after 2nd heating (g)

7.59

11

Mole ratio between H2O and anhydrous salt

 

5

Constant mass of anhydrous salt & test tube (g)

 

12

Experimental empirical formula

 

6

Mass of water driven off (g)

 

13

Theoretical empirical formula

MgSO4 . 7 H2O

 

Part 4 Equations Balance and identify the type of equation for the following reactions.

 

10.) ___ Al + ___ Br2 ___ AlBr3 TYPE:

 

11.) ___ Na3PO4 + ___ ZnSO4 ___ Na2SO4 + ___ Zn3(PO4)2 TYPE:

 

12.) ___ Zn + ___ HCl ___ ZnCl2 + ___ H2 TYPE:

 

13.) ___ C2H4 + ___ O2 ___ CO2 + ___ H2O TYPE:

 

14.) ___ NaHCO3 ___ Na2O + ___ CO2 + ___ H2O TYPE:

 

Part 5 Predicting Products Decide if the following reactions happen or not. If a reaction does occur, write the formula(s) for the products and balance the equation.

 

15.) ___ Na + ___ MnO2

 

16.) ___ Al(NO3)3 + ___K3PO4

 

17.) ___ ZnCrO4 + ___ Fe

 

18.) ___ Mg(C2H3O2)2 + ___ BaCl2

 

19.) ___ LiCl + ___ F2

 

20.) ___ AgNO3 + (NH4)2CO3

 

Unit 8 Review Worksheet (Standard level)

(A)     Write the formula(s) for the products of the reaction (if they are not already given).

(B)      Balance the equation.

(C)     Tell the type of reaction.

 

 

Reactants

 

Products

Type of Equation

1.

silver nitrate + sodium chloride

__ AgNO3 + __ NaCl

 

__ AgCl + __ NaNO3

 

2.

ammonium sulfide + barium nitrate

__ (NH4)2S + __ Ba(NO3) 2

 

__ NH4NO3 + __ BaS

 

3.

lithium carbonate

__ Li2CO3

 

__ Li2O + __ CO2

 

4.

zinc + sulfur

__ Zn + __ S

 

__ ZnS

 

5.

potassium + chlorine

__ K + __ Cl2

 

__ KCl

 

6.

magnesium nitride

__ Mg3N2

 

__ Mg + __ N2

 

7.

aluminum + copper (II) sulfate

__ Al + __ CuSO4

 

 

8.

aluminum + iron (III) bromide

__ Al + __ FeBr3

 

 

9.

__ H2CO3

 

 

10.

zinc + nickel (II) nitrate

__ Zn + __ Ni(NO3)2

 

 

11.

magnesium + silver sulfate

__ Mg + __ Ag2SO4

 

 

12.

potassium sulfate + aluminum chlorate

__ K2SO4 + __ Al(ClO3)3

 

__ KClO3 + __ Al2(SO4)3

 

13.

ethane (C2H6) + oxygen

__ C2H6 + __ O2

 

 

14.

copper (II) chloride + sodium phosphate

__ CuCl2 + __ Na3PO4

 

__ Cu3(PO4) 2 + __ NaCl

 

15.

calcium bicarbonate

__ Ca(HCO3)2

 

__ CaO + __ CO2 + __ H2O

 

16.

strontium nitrate + copper (II) sulfate

__ Sr(NO3)2 + __ CuSO4

 

__ SrSO4 + __ Cu(NO3)2

 

17.

magnesium acetate + iron (III) carbonate

__ Mg(C2H3O2)2 + __ Fe2(CO3)3

 

__ MgCO3 + __ Fe(C2H3O2)3

 

18.

copper (II) phosphate + zinc

__ Cu3(PO4)2 + __ Zn

 

 

19.

potassium + HCl

__ K + __ HCl

 

 

20.

calcium + potassium chlorate

__ Ca + __ KClO3

 

 

 

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